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authorJörg Frings-Fürst <debian@jff-webhosting.net>2020-08-24 21:26:53 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2020-08-24 21:26:53 +0200
commitdf247efec654e512242e4f4f1b0212034f9e01fe (patch)
tree25c02e16957f3aa613af30c140fd8e8a3d52fda6 /app/bin/validator.c
parentd0b6a8a4ec298024f14f704f9e40a6f9d324ccf3 (diff)
parenta5ade52caa489cf0a713e0f02b764000d203140e (diff)
Merge branch 'release/debian/1%5.2.0Beta2.1-1' into masterHEADdebian/1%5.2.0Beta2.1-1master
Diffstat (limited to 'app/bin/validator.c')
-rw-r--r--app/bin/validator.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/app/bin/validator.c b/app/bin/validator.c
new file mode 100644
index 0000000..c415471
--- /dev/null
+++ b/app/bin/validator.c
@@ -0,0 +1,87 @@
+/** \file validator.c
+* Validators for misc textformats
+*/
+
+/* XTrackCAD - Model Railroad CAD
+* Copyright (C) 2019 Martin Fischer
+*
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation; either version 2 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#include <stdbool.h>
+#include "validator.h"
+
+/**
+* Simplistic checking of URL syntax validity. Checks:
+* if scheme is present, it has to be terminated by double /
+* hostname has at least 5 characters
+*
+* \param testString
+* \return TRUE if valid, FALSE otherwise
+*/
+
+enum URLSCANSTATE { STATE_SCHEME, STATE_ENDOFSCHEME, STATE_HIER, STATE_PATH, STATE_ERROR };
+
+#define MINURLLENGTH 5 /* 2 chars domain name, dot, 2 chars TLD */
+
+bool
+IsValidURL(char *testString)
+{
+ char *result = testString;
+ char *hostname = testString;
+ enum URLSCANSTATE state = STATE_SCHEME;
+
+ if (!*result) {
+ return(false);
+ }
+
+ while (*result && state != STATE_ERROR) {
+ switch (*result) {
+ case ':':
+ if (state == STATE_SCHEME) {
+ if (result == testString) {
+ state = STATE_ERROR;
+ } else {
+ state = STATE_ENDOFSCHEME;
+ }
+ }
+ break;
+ case '/':
+ if (state == STATE_ENDOFSCHEME) {
+ if (*(result + 1) == '/') {
+ state = STATE_HIER;
+ hostname = result + 2;
+ result++;
+ } else {
+ state = STATE_ERROR;
+ }
+ } else {
+ if (state == STATE_HIER || state == STATE_SCHEME) {
+ state = STATE_PATH;
+ if (result - hostname < MINURLLENGTH) {
+ state = STATE_ERROR;
+ }
+ }
+ }
+ break;
+ default:
+ break;
+
+ }
+ result++;
+ }
+
+ return (state != STATE_ERROR);
+}